/**
* Returns an array containing, for each field, the arary key used for that
* field in self::$_fields.
*
* @return array
*/
static function &fieldKeys()
{
if (!self::$_fieldKeys) {
self::$_fieldKeys = array('id' => 'id', 'entity_table' => 'entity_table', 'entity_id' => 'entity_id', 'pledge_frequency_unit' => 'pledge_frequency_unit', 'is_pledge_interval' => 'is_pledge_interval', 'max_reminders' => 'max_reminders', 'initial_reminder_day' => 'initial_reminder_day', 'additional_reminder_day' => 'additional_reminder_day');
}
return self::$_fieldKeys;
}
